Resumo

TORRES, René; APARICIO, Rafael; ASTUDILLO, Luis  e  CARRASQUEL, José. Dynamics of physicochemical variables of the water of lagoons situated on physiographys of “bancos, bajíos y esteros” to watering places for cattle, on hyperstational savannas of Mantecal, Apure state. Zootecnia Trop. [online]. 2009, vol.27, n.4, pp.437-442. ISSN 0798-7269.

In order to study the dynamics of physicochemicals components of water obtained from lagoons situated on physiographys of “bancos, bajíos y esteros” that serve as watering places for cattle, samples from savannas of Mantecal, Apure state, Venezuela were taken and measured between march - 2005 to april - 2007. Results showed proverty of mineral elements for adecuate mineral nutrition, low electric conductivity and slightly acids pH, which in periods of draught had a tendency to neutrality. Sodium, potassium, calcium cations and less frequent magnesium, presented greater values on the lagoons in the physiographys of “esteros and bajíos” specially during the dry season. Concentrations of sulfur and iron rise during the dry season, coinciding with reproductive season, this could induce metabolic disorder related to mineral nutrition of the herds

Palavras-chave : water; lagoons; savannas; mineral.

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